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running without a DPF?!?

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Old Oct 14th, 2019, 13:26   #1
emmdee
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Default running without a DPF?!?

My father-in-law drives a 1.6 diesel V50. He called me to say his DPF was knacked and asked me to put him in touch with a local indy Volvo specialist I use. Anyway, I met him yesterday and asked him how much the replacement DPF had cost and he said "Nothing. The garage just disconnected it".

I assumed he was going to run it without the DPF til his next NCT (Irish equivalent of MOT as he lives in RoI) but he said that his garage had just told him to drive without it and it wouldn't be a problem. In fact, he'd probably see better mileage!

Now I'm wondering - how is a vehicle going to pass an emissions test without a DPF? If we could all drive without them, why would we bother fitting them in the first place?

Does anyone have any experience of this? I'm baffled!
m.d.
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Old Oct 14th, 2019, 13:53   #2
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Just removing it should cause the dash to show faults, it will probably cause other issues too as it attempts to regen.

Here any visible smoke on a car with a DPF should result in an MOT failure.
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Old Oct 14th, 2019, 16:06   #3
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Originally Posted by emmdee View Post
My father-in-law drives a 1.6 diesel V50. He called me to say his DPF was knacked and asked me to put him in touch with a local indy Volvo specialist I use. Anyway, I met him yesterday and asked him how much the replacement DPF had cost and he said "Nothing. The garage just disconnected it".

I assumed he was going to run it without the DPF til his next NCT (Irish equivalent of MOT as he lives in RoI) but he said that his garage had just told him to drive without it and it wouldn't be a problem. In fact, he'd probably see better mileage!

Now I'm wondering - how is a vehicle going to pass an emissions test without a DPF? If we could all drive without them, why would we bother fitting them in the first place?

Does anyone have any experience of this? I'm baffled!
m.d.
how can he remove it? It is a vital part of the first metre of the exhaust system? It will fail the UK MOT test ...
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Old Oct 14th, 2019, 20:21   #4
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It's a NCT in Ireland, but I assume there's an emissions test as part of that. His garage have told him it'll run grand without it. Puzzling...
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Old Oct 14th, 2019, 21:22   #5
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Run no problem if mapped out. Pass mot/nct no problem as long as it looks visibly to be there!
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Old Oct 14th, 2019, 22:03   #6
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Diesel soot is nasty stuff....I'm not saying petrol engines are perfect, but diesel soot is particularly nasty stuff especially for the lungs.... please don't drive past any schools in the morning.
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Old Oct 14th, 2019, 23:41   #7
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MOT tester here ,

Bottom line IF you delete / cut out /gut a DPF , come test time it will show up on the emissions test , no if's or buts .

A DPF equipped engine MUST NOT show any visible smoke & is pretty much guaranteed to blow in excess of the vehicles plate limit .

I know this because i keep issuing refusal certificates for such modifications

It is also a criminal offence to knowingly remove/ tamper with or operate a vehicle with such modifications . Just wait till you get caught out
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Old Oct 15th, 2019, 02:59   #8
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MOT tester here ,

Bottom line IF you delete / cut out /gut a DPF , come test time it will show up on the emissions test , no if's or buts .

A DPF equipped engine MUST NOT show any visible smoke & is pretty much guaranteed to blow in excess of the vehicles plate limit .

I know this because i keep issuing refusal certificates for such modifications

It is also a criminal offence to knowingly remove/ tamper with or operate a vehicle with such modifications . Just wait till you get caught out
I have to chuckle sometimes, half the world is in thrall to a sixteen year old eco weenie and are busy gluing themselves to roads and buildings in her name, the other half are doing **** like this.
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Old Oct 15th, 2019, 07:45   #9
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There's nowt stranger than folk !
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Old Oct 15th, 2019, 08:51   #10
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Run no problem if mapped out. Pass mot/nct no problem as long as it looks visibly to be there!
That's cheating and illegal, as well as immoral

That's like saying: I'll just rob a bank, it'll be fine as long as no-one looks
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